| 摘要 |
PURPOSE:To dispence with wiring work as well as save power by arranging a light diffusion board in the light advancing direction of LEDs powered by a solar battery and a storage battery, and by arranging a reflection board on the rear side of LED. CONSTITUTION:A solar battery 1 is connected to a circuit board in a case main body 3 and arranged at a place directly irradiated with sunbeam. A stor age battery 10 is stored in a battery storing part 11 and on an indication board 14, characters, figures and the like are formed. These characters and figures can be read in the daytime. In the nighttime, portions not required to be indicat ed is shielded from light by performing printing with an opaque ink on the rear face or a light diffusion board 13 so as to light up the required portions in a spot manner. LED 8 may be arranged on the portions required to be indicat ed in the night time. As for the light from the LECD 8, emission light A around a center axis is diffused with a diffusion board 13, while emission lights B, C deviated therefrom reach the board 13 directly and indirectly, so that they are diffused. The light of diode 8 is effectivy radiated in a wide area. |
